<template>
    <div>
        <el-upload
                class="avatar-uploader"
                :action="action"
                :show-file-list="false"
                :on-success="handleAvatarSuccess"
                :before-upload="beforeAvatarUpload"
                :headers="headers"
        >
            <img v-if="value" :src="value" class="avatar"/>
            <i v-else class="el-icon-plus avatar-uploader-icon"></i>
        </el-upload>
    </div>
</template>

<script>
    export default {
        props: ['value', 'sid'],
        computed: {
            action() {
                return this.sid ? `/api/upload/site/${this.sid}` : '/api/upload/local'
            },
            headers() {
                return {
                    Authorization: `Bearer ${window.localStorage.getItem('token')}`,
                    'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
                }
            }
        }
        ,
        methods: {
            handleAvatarSuccess(res, file) {
                this.imageUrl = res.path
                this.$emit('input', this.imageUrl)
            }
            ,
            beforeAvatarUpload(file) {
                const isJPG = file.type === 'image/jpeg'
                const isLt2M = file.size / 1024 / 1024 < 2
                if (!isJPG) {
                    this.$message.error('上传头像图片只能是 JPG 格式!')
                }
                if (!isLt2M) {
                    this.$message.error('上传头像图片大小不能超过 2MB!')
                }
                return isJPG && isLt2M
            }
        }
    }
</script>

<style>
    .avatar-uploader .el-upload {
        border: 1px dashed #d9d9d9;
        border-radius: 6px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
    }

    .avatar-uploader .el-upload:hover {
        border-color: #409eff;
    }

    .avatar-uploader-icon {
        font-size: 28px;
        color: #8c939d;
        width: 178px;
        height: 178px;
        line-height: 178px;
        text-align: center;
    }

    .avatar {
        width: auto;
        height: 178px;
        display: block;
    }
</style>
